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        Api
        Callowell
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        Senior Software Engineer - Pensions, ISA and Investments

        Hargreaves Lansdown
        Bristol (BS1)
        £65000 - £80000 per annum + generous bonus, pension and more
        Salary: Up to £80,000 dependent on experience HL are looking for a talented full stack Senior Software Engineer to join a Pensions & Retirement product engineering team in building market leading solutions for our clients. This is an opportunity to join the UK's number one investment services company, looking after over £180bn billion in assets on behalf of more than 2 million UK investors. This is your chance to genuinely stamp your mark on one of the UK's most innovative and digital-focused businesses. What You'll Be Doing * Build and run AWS Cloud-native applications with TypeScript and React * Establish and maintain automated tests for the changes being implemented. * Write high quality, secure, tested and performant code. * Upskilling - Providing coaching & mentoring to peers and more junior members of the team
        Salary: Up to £80,000 dependent on experience HL are looking for a talented full stack Senior Software Engineer to join a Pensions & Retirement product engineering team in building market leading solutions for our clients. This is an opportunity to join the UK's number one investment services company, looking after over £180bn billion in assets on behalf of more than 2 million UK investors. This is your chance to genuinely stamp your mark on one of the UK's most innovative and digital-focused businesses. What You'll Be Doing * Build and run AWS Cloud-native applications with TypeScript and React * Establish and maintain automated tests for the changes being implemented. * Write high quality, secure, tested and performant code. * Upskilling - Providing coaching & mentoring to peers and more junior members of the team
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        FEATURED
        Thales people architect identity management and data protection solutions at the heart of digital security. Business and governments rely on us to bring trust to the billons of digital interactions they have with people. Our technologies and services help banks exchange funds, people cross borders, energy become smarter and much more. More than 30,000 organizations already rely on us to verify the identities of people and things, grant access to digital services, analyze vast quantities of information and encrypt data to make the connected world more secure. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer.
        Thales people architect identity management and data protection solutions at the heart of digital security. Business and governments rely on us to bring trust to the billons of digital interactions they have with people. Our technologies and services help banks exchange funds, people cross borders, energy become smarter and much more. More than 30,000 organizations already rely on us to verify the identities of people and things, grant access to digital services, analyze vast quantities of information and encrypt data to make the connected world more secure. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer.
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        We are looking for the right people people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the worlds largest providers of products and services to the global energy industry. Job Duties We are seeking a skilled and proactive Data Integration Engineer to join the Neftex Technical Services team. Reporting to the Team Lead the Data Integration Engineer will be responsible for designing, building, and maintaining robust data pipelines and integration frameworks that connect diverse systems including LLMs and a proprietary Data Integration solution.
        We are looking for the right people people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the worlds largest providers of products and services to the global energy industry. Job Duties We are seeking a skilled and proactive Data Integration Engineer to join the Neftex Technical Services team. Reporting to the Team Lead the Data Integration Engineer will be responsible for designing, building, and maintaining robust data pipelines and integration frameworks that connect diverse systems including LLMs and a proprietary Data Integration solution.
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        Location/s: Bristol, Croydon, Liverpool, Newcastle, Southampton; UK Recruiter contact: Ainsley Anstess Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, youre surrounded by global specialists who want to combine their expertise and champion you to be your best.
        Location/s: Bristol, Croydon, Liverpool, Newcastle, Southampton; UK Recruiter contact: Ainsley Anstess Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, youre surrounded by global specialists who want to combine their expertise and champion you to be your best.
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        An Amazing Career Opportunity for a Senior Engineer Connector API !! Location: Cardiff, UK A senior developer role, working on Connectors and supporting software used in other applications. You are expected to be hands on and spend a significant amount of your time writing code and implementing features/stories defined by the Product Owner. As a contributor, you'll be a team member charged with implementing features in a timely fashion seamlessly with the overall solution offered to our customers. This role is for the generation of a set of libraries which is then used to build connectors. These connectors communicate between HID devices and 3rd party products. The deployment environment varies, sometimes the 3rd party products are "on prem" with a libraries approach or it might be a Cloud based deployment with a RESTful API as the interface.
        An Amazing Career Opportunity for a Senior Engineer Connector API !! Location: Cardiff, UK A senior developer role, working on Connectors and supporting software used in other applications. You are expected to be hands on and spend a significant amount of your time writing code and implementing features/stories defined by the Product Owner. As a contributor, you'll be a team member charged with implementing features in a timely fashion seamlessly with the overall solution offered to our customers. This role is for the generation of a set of libraries which is then used to build connectors. These connectors communicate between HID devices and 3rd party products. The deployment environment varies, sometimes the 3rd party products are "on prem" with a libraries approach or it might be a Cloud based deployment with a RESTful API as the interface.
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        An Amazing Career Opportunity for a Senior Software Engineer- Connectors !! Location: Cardiff, UK A senior developer role, working on Connectors and supporting software used in other applications. You are expected to be hands on and spend a significant amount of your time writing code and implementing features/stories defined by the Product Owner. As a contributor, you'll be a team member charged with implementing features in a timely fashion seamlessly with the overall solution offered to our customers. This role is for the generation of a set of libraries which is then used to build connectors. These connectors communicate between HID devices and 3rd party products. The deployment environment varies, sometimes the 3rd party products are "on prem" with a libraries approach or it might be a Cloud based deployment with a RESTful API as the interface.
        An Amazing Career Opportunity for a Senior Software Engineer- Connectors !! Location: Cardiff, UK A senior developer role, working on Connectors and supporting software used in other applications. You are expected to be hands on and spend a significant amount of your time writing code and implementing features/stories defined by the Product Owner. As a contributor, you'll be a team member charged with implementing features in a timely fashion seamlessly with the overall solution offered to our customers. This role is for the generation of a set of libraries which is then used to build connectors. These connectors communicate between HID devices and 3rd party products. The deployment environment varies, sometimes the 3rd party products are "on prem" with a libraries approach or it might be a Cloud based deployment with a RESTful API as the interface.
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        An Amazing Career Opportunity for a Staff Engineer Connector API !! Location: Cardiff, UK A technical leadership role responsible for the architecture, design direction, and technical strategy of the Connectors product area. Working under the overall guidance of the Solution Architect, this role provides hands-on technical leadership and architectural direction to the software engineers responsible for implementing individual connectors. The Product-Level Architect ensures that all connectors adhere to a consistent framework, design standards, and security principles, while remaining performant, maintainable, and extensible. This role is expected to be roughly a 50% / 50% between product level architecture and writing code. It is ideal for those people who want to be involved with architecture but still want to write code.
        An Amazing Career Opportunity for a Staff Engineer Connector API !! Location: Cardiff, UK A technical leadership role responsible for the architecture, design direction, and technical strategy of the Connectors product area. Working under the overall guidance of the Solution Architect, this role provides hands-on technical leadership and architectural direction to the software engineers responsible for implementing individual connectors. The Product-Level Architect ensures that all connectors adhere to a consistent framework, design standards, and security principles, while remaining performant, maintainable, and extensible. This role is expected to be roughly a 50% / 50% between product level architecture and writing code. It is ideal for those people who want to be involved with architecture but still want to write code.
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        About the Role Working within our Technology team youll be integral in ensuring we have the right mix of technology to achieve the wider team's ambitions. You will be joining us at a pivotal moment in our journey as we seek to combine Agile methodologies with Microsoft's Azure technology stack. * Designing and building low code business applications and processes utilising data stored in Sharepoint, SQL and SaaS. * Developing Canvas PowerApps, PowerAutomate Flows and PowerAutomate Desktop Flows. * Expanding the Power Platform using Azure. * Working with Microsoft PowerBI to build data visualisations across multiple data sets. * Implementing end-to-end solutions that improve collaboration, productivity, and knowledge sharing. * Identifying areas and processes where the Microsoft environment can be better leveraged and facilitating process improvement.
        About the Role Working within our Technology team youll be integral in ensuring we have the right mix of technology to achieve the wider team's ambitions. You will be joining us at a pivotal moment in our journey as we seek to combine Agile methodologies with Microsoft's Azure technology stack. * Designing and building low code business applications and processes utilising data stored in Sharepoint, SQL and SaaS. * Developing Canvas PowerApps, PowerAutomate Flows and PowerAutomate Desktop Flows. * Expanding the Power Platform using Azure. * Working with Microsoft PowerBI to build data visualisations across multiple data sets. * Implementing end-to-end solutions that improve collaboration, productivity, and knowledge sharing. * Identifying areas and processes where the Microsoft environment can be better leveraged and facilitating process improvement.
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        At INRIX, we deliver mobility data, insights, and software solutions for todays connected cars, smart cities, data-driven companies, and tomorrows autonomous vehicles. Our customers include automotive companies, enterprises both large and small, and municipalities and governments around the world. At INRIX, we take pride in building the worlds most comprehensive mobility data and insights. We are looking for a new member to join our data operations team in Birmingham. As a Data Operations Specialist on the data operations team, you will work on ensuring the accuracy, currency, and completeness of our data product. You will work closely with Data Aggregation and Engineering teams to fulfil project deliverables and resolve data issues. Responsibilities * Quality Assurance and Control of our ground truth data assets.
        At INRIX, we deliver mobility data, insights, and software solutions for todays connected cars, smart cities, data-driven companies, and tomorrows autonomous vehicles. Our customers include automotive companies, enterprises both large and small, and municipalities and governments around the world. At INRIX, we take pride in building the worlds most comprehensive mobility data and insights. We are looking for a new member to join our data operations team in Birmingham. As a Data Operations Specialist on the data operations team, you will work on ensuring the accuracy, currency, and completeness of our data product. You will work closely with Data Aggregation and Engineering teams to fulfil project deliverables and resolve data issues. Responsibilities * Quality Assurance and Control of our ground truth data assets.
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        What if you could do the kind of work the world needs? At WSP, you can access our global scale, contribute to landmark projects and connect with the brightest minds in your field to do the best work of your life. You can embrace your curiosity in a culture that celebrates new ideas and diverse perspectives. You can experience a world of opportunity and the chance to shape a career as unique as you. To find out more about our Property and Buildings business click on the following link and discover what awaits you at WSP: Property and Buildings | WSP ( Team Youll join a small, established team of developers focused on building-services workflows. Its a collaborative environment: close to the engineers, quick feedback loops, and a clear delivery backlog.
        What if you could do the kind of work the world needs? At WSP, you can access our global scale, contribute to landmark projects and connect with the brightest minds in your field to do the best work of your life. You can embrace your curiosity in a culture that celebrates new ideas and diverse perspectives. You can experience a world of opportunity and the chance to shape a career as unique as you. To find out more about our Property and Buildings business click on the following link and discover what awaits you at WSP: Property and Buildings | WSP ( Team Youll join a small, established team of developers focused on building-services workflows. Its a collaborative environment: close to the engineers, quick feedback loops, and a clear delivery backlog.
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        Overview Stirling Dynamics is recruiting a part-time ERP Consultant to support the ongoing development and reliable operation of our Epicor Kinetic platform. We have recently introduced Epicor Kinetic as our ERP system and are looking for an Epicor expert who can support us with technical issues and ongoing development. This role will act as the go-to expert ensuring alignment between technical configuration and business process requirements, maintaining data integrity, and enabling future scalability. Due to the nature of the role, the level of hours will vary throughout the year. This role will be based in our Bristol office however the Consultant will be able to work remotely part of the time. Responsibilities * Support with the design and implementation of the ERP roadmap in line with Stirling Dynamics business strategy
        Overview Stirling Dynamics is recruiting a part-time ERP Consultant to support the ongoing development and reliable operation of our Epicor Kinetic platform. We have recently introduced Epicor Kinetic as our ERP system and are looking for an Epicor expert who can support us with technical issues and ongoing development. This role will act as the go-to expert ensuring alignment between technical configuration and business process requirements, maintaining data integrity, and enabling future scalability. Due to the nature of the role, the level of hours will vary throughout the year. This role will be based in our Bristol office however the Consultant will be able to work remotely part of the time. Responsibilities * Support with the design and implementation of the ERP roadmap in line with Stirling Dynamics business strategy
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        What if you could do the kind of work the world needs? At WSP, you can access our global scale, contribute to landmark projects and connect with the brightest minds in your field to do the best work of your life. You can embrace your curiosity in a culture that celebrates new ideas and diverse perspectives. You can experience a world of opportunity and the chance to shape a career as unique as you. To find out more about our Property and Buildings business click on the following link and discover what awaits you at WSP: Property and Buildings | WSP ( Team Youll join a small, established team of developers focused on building-services workflows. Its a collaborative environment: close to the engineers, quick feedback loops, and a clear delivery backlog.
        What if you could do the kind of work the world needs? At WSP, you can access our global scale, contribute to landmark projects and connect with the brightest minds in your field to do the best work of your life. You can embrace your curiosity in a culture that celebrates new ideas and diverse perspectives. You can experience a world of opportunity and the chance to shape a career as unique as you. To find out more about our Property and Buildings business click on the following link and discover what awaits you at WSP: Property and Buildings | WSP ( Team Youll join a small, established team of developers focused on building-services workflows. Its a collaborative environment: close to the engineers, quick feedback loops, and a clear delivery backlog.
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        An Amazing Career Opportunity for a Senior QA Engineer!! Location: Cardiff, UK We are currently recruiting for a Senior QA Engineer to join our team here in Cardiff! Working within the Customer Facing Tools team, you will be responsible for managing an automated CI test suite that performs end to end testing of our enterprise scale device management solution that involves multiple complex software packages and integrations with cloud services enabling RFID Reader configuration. The qualified candidate will design and automate comprehensive test cases within a scalable CI/CD environment to ensure thorough validation of software features. Provides timely reporting to boost developer and customer confidence while improving release quality through early bug detection. If this sounds like you keep on reading ! Who are we?
        An Amazing Career Opportunity for a Senior QA Engineer!! Location: Cardiff, UK We are currently recruiting for a Senior QA Engineer to join our team here in Cardiff! Working within the Customer Facing Tools team, you will be responsible for managing an automated CI test suite that performs end to end testing of our enterprise scale device management solution that involves multiple complex software packages and integrations with cloud services enabling RFID Reader configuration. The qualified candidate will design and automate comprehensive test cases within a scalable CI/CD environment to ensure thorough validation of software features. Provides timely reporting to boost developer and customer confidence while improving release quality through early bug detection. If this sounds like you keep on reading ! Who are we?
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        AI Engineer - Contract (Remote, UK based) - EdTech - 4-6 Months + Possible Extension - £350-375 p/d outside IR35 A UK-based EdTech Start-Up is hiring an experienced contract AI Engineer to help build the next generation of their intelligent assessment systems. Used by awarding bodies and training providers, you'll work across backend services, LLM workflows, evaluation pipelines, and agentic automation. You will deliver scalable AI features that improve the accuracy, consistency, and speed of skills and knowledge evaluation. This role suits someone who enjoys autonomy, works well in a pragmatic environment, and is confident making technical decisions without fully defined specs.
        AI Engineer - Contract (Remote, UK based) - EdTech - 4-6 Months + Possible Extension - £350-375 p/d outside IR35 A UK-based EdTech Start-Up is hiring an experienced contract AI Engineer to help build the next generation of their intelligent assessment systems. Used by awarding bodies and training providers, you'll work across backend services, LLM workflows, evaluation pipelines, and agentic automation. You will deliver scalable AI features that improve the accuracy, consistency, and speed of skills and knowledge evaluation. This role suits someone who enjoys autonomy, works well in a pragmatic environment, and is confident making technical decisions without fully defined specs.
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        Salary: £66,379 - £82,974 DOE + Benefits + Profit Share Bonus Fully office based in Hythe, Kent We care deeply about inclusive working practices and diverse teams. If you'd prefer to work full-time, part-time or as a job-share, we'll facilitate this wherever we can - whether to help you meet other commitments or to help you strike a great work-life balance. About At Holiday Extras, were creating a workplace where everyone can thrive, build their careers and reach their limitless potential. As a Sunday Times Best Place to Work 2025, were proud to offer a world of benefits designed to enhance your lifestyle and well-being. By joining our team, youll feel supported and rewarded every day. Were looking for a Lead Technical Product Manager to act as the Area Product Owner for our Supply & Partner requirement area.
        Salary: £66,379 - £82,974 DOE + Benefits + Profit Share Bonus Fully office based in Hythe, Kent We care deeply about inclusive working practices and diverse teams. If you'd prefer to work full-time, part-time or as a job-share, we'll facilitate this wherever we can - whether to help you meet other commitments or to help you strike a great work-life balance. About At Holiday Extras, were creating a workplace where everyone can thrive, build their careers and reach their limitless potential. As a Sunday Times Best Place to Work 2025, were proud to offer a world of benefits designed to enhance your lifestyle and well-being. By joining our team, youll feel supported and rewarded every day. Were looking for a Lead Technical Product Manager to act as the Area Product Owner for our Supply & Partner requirement area.
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        Senior Control and Instrumentation Engineer - G17 Senior Control & Instrumentation Engineer - G17 Location: Aberdeen - Hybrid/Remote working available Rate: Negotiable hourly rate - Must have LTD Company and Company insurances to apply. Applicants need to have the right to live and work in the UK Penspen are currently recruiting for an Onshore Ltd contract Senior Control & Instrumentation Engineer - G17 Role Purpose Provide senior-level technical leadership in control and instrumentation engineering across all project phases. Ensure safe, compliant, and efficient C&I designs, act as a subject matter expert, and support project delivery while mentoring junior engineers. Key Responsibilities * Lead preparation, review, and approval of C&I engineering deliverables (control philosophies, instrument datasheets, loop diagrams, C&E charts, specifications).
        Senior Control and Instrumentation Engineer - G17 Senior Control & Instrumentation Engineer - G17 Location: Aberdeen - Hybrid/Remote working available Rate: Negotiable hourly rate - Must have LTD Company and Company insurances to apply. Applicants need to have the right to live and work in the UK Penspen are currently recruiting for an Onshore Ltd contract Senior Control & Instrumentation Engineer - G17 Role Purpose Provide senior-level technical leadership in control and instrumentation engineering across all project phases. Ensure safe, compliant, and efficient C&I designs, act as a subject matter expert, and support project delivery while mentoring junior engineers. Key Responsibilities * Lead preparation, review, and approval of C&I engineering deliverables (control philosophies, instrument datasheets, loop diagrams, C&E charts, specifications).
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        Margaret Howell is a contemporary British clothing designer who has worked successfully in mens and womens clothing for over five decades. Today, Margaret Howell clothes are sold worldwide with 12 directly operated shops in Europe, over 100 outlets in Japan and an established online business. We are seeking a highly organised and technically skilled individual with a strong understanding of IT systems to join our team as an IT Systems Assistant. This role involves providing hands-on support across company systems and applications, ensuring smooth integrations, and maintaining robust security standards. Its an excellent opportunity for someone eager to develop their expertise in IT operations, troubleshooting, and system administration within a fast-paced, collaborative environment. Location Head office/ Remote Hours Full-time - 35 hours, Monday - Friday
        Margaret Howell is a contemporary British clothing designer who has worked successfully in mens and womens clothing for over five decades. Today, Margaret Howell clothes are sold worldwide with 12 directly operated shops in Europe, over 100 outlets in Japan and an established online business. We are seeking a highly organised and technically skilled individual with a strong understanding of IT systems to join our team as an IT Systems Assistant. This role involves providing hands-on support across company systems and applications, ensuring smooth integrations, and maintaining robust security standards. Its an excellent opportunity for someone eager to develop their expertise in IT operations, troubleshooting, and system administration within a fast-paced, collaborative environment. Location Head office/ Remote Hours Full-time - 35 hours, Monday - Friday
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        Software Engineer / API / Microservices / Outside IR35 Brilliant opportunity available for a Senior Software Engineer, with experience of coding APIs/web services has become available with a business based in Oxfordshire. The role can be largely remote with up to once a week office work in Didcot and ideally starting mid December - early Jan. We need experience of - - Python or Rust are the preferred languages - Coding APIs/web services - Microservices - Ideally experience with Devops/Kubernetes and Azure Interviews can be scheduled right away with a view of starting mid December - early Jan Apply via the link below or email me with your CV (joss. Escott @ Roberthalf. co. uk) Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion.
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        AI ML Engineer

        Stackstudio Digital Ltd.
        London
        From £425 to £450 per day
        Role / Job Title:AI ML Engineer Work Location:London Office Requirement (Hybrid):2 times / week Any Other Working Conditions (Travel / On-call / Shifts):May require travel to other Llyods Office on demand (will be reimbursed) The Role This is for an Agentic AI Role in Lloyds Banking Group. Key Responsibilities * Build scalable data pipelines and workflows on GCP (Big Query, Vertex AI, Dataflow, Pub/Sub, Redis and NoSQL Databases, maintaining chat history, etc.) * Implement best practices for data governance, security, and MLOps on GCP * Optimize model performance, monitor production systems, and ensure reliability, auto scaling using Prometheus, Dynatrace, and Lang Smith Desirable Skills / Knowledge / Experience * Hands-on experience with GenAI, Gemini, or open-source LLMs; train, fine-tune, and onboard new LLMs * Experience in building GenAI applications using Python
        Role / Job Title:AI ML Engineer Work Location:London Office Requirement (Hybrid):2 times / week Any Other Working Conditions (Travel / On-call / Shifts):May require travel to other Llyods Office on demand (will be reimbursed) The Role This is for an Agentic AI Role in Lloyds Banking Group. Key Responsibilities * Build scalable data pipelines and workflows on GCP (Big Query, Vertex AI, Dataflow, Pub/Sub, Redis and NoSQL Databases, maintaining chat history, etc.) * Implement best practices for data governance, security, and MLOps on GCP * Optimize model performance, monitor production systems, and ensure reliability, auto scaling using Prometheus, Dynatrace, and Lang Smith Desirable Skills / Knowledge / Experience * Hands-on experience with GenAI, Gemini, or open-source LLMs; train, fine-tune, and onboard new LLMs * Experience in building GenAI applications using Python
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        Frequently Asked Questions

        How many part time API jobs are there in Callowell?
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